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We designed a switchless event building farm for the Belle experiment at the KEKB [e.sup.+] [e.sup.-] collider, as a replacement of the existing event builder and the online farm systems. In the new system, PCs are directly interconnected with multiple point-to-point Fast and Gigabit Ethernet connections. The PCs build the detector data in two steps to perform distributed event processing. We set up a test system and confirmed the event building performance meets our new requirements using a realistic prototype software. The system is being installed as sceduled using the summer shutdown time in 2001. Index Terms--Data acquisition, data transfer, event building, event filtering.

The adulteration of dietary supplements with drugs is potentially dangerous for human health. In this study, a method was used to test simultaneously for the presence of three synthetic PDE-5 inhibitors (sildenafil, vardenafil and tadalafil), and sibutramine and its two major metabolites (N-desmethylsibutramine and N-didesmethylsibutramine) using ultra-performance liquid chromatography (UPLC) coupled with quadrupole-time-of-flight mass spectrometry (Q-TOF MS) in dietary supplements. This approach with UPLC/Q-TOF MS uses the high accurate mass of six compounds for identification and has a short run time. The recovery was from 87% to 113%; precision was less than 12.8%. The limit of detection and limit of quantification were from 0.4 to 2.0 µg kg(-1) and from 1.3 to 6.0 µg kg(-1), respectively. This method allows easy and fast analysis and detection of diverse adulterants.